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| author | Jiri Slaby <jslaby@suse.cz> | 2016-10-03 12:18:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-27 17:37:43 +0300 |
| commit | d705ff38189fcfbbfa6aa97363d30c23348ad166 (patch) | |
| tree | 48b1720feab3c44d79b2d4cdfdc13c82941c1f2e /drivers/video/console/newport_con.c | |
| parent | de48b0999df44b5d2ab75500a48aedff5a36f0e6 (diff) | |
| download | linux-d705ff38189fcfbbfa6aa97363d30c23348ad166.tar.xz | |
tty: vt, cleanup and document con_scroll
Scrolling helpers scrup and scrdown both accept 'top' and 'bottom' as
unsigned int. Number of lines 'nr' is accepted as int, but all callers
pass down unsigned too. So change the type of 'nr' to unsigned too.
Now, promote unsigned int from the helpers up to the con_scroll
hook which actually accepted all those as signed int.
Next, the 'dir' parameter can have only two values and we define
constants for that: SM_UP and SM_DOWN. Switch them to enum and do
proper type checking on 'dir' too.
Finally, document the behaviour of the hook.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: <linux-fbdev@vger.kernel.org>
Cc: <linux-usb@vger.kernel.org>
Cc: <linux-parisc@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/video/console/newport_con.c')
| -rw-r--r-- | drivers/video/console/newport_con.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c index e3b9521e4ec3..1e11614322fe 100644 --- a/drivers/video/console/newport_con.c +++ b/drivers/video/console/newport_con.c @@ -574,8 +574,8 @@ static int newport_font_set(struct vc_data *vc, struct console_font *font, unsig return newport_set_font(vc->vc_num, font); } -static int newport_scroll(struct vc_data *vc, int t, int b, int dir, - int lines) +static bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b, + enum con_scroll dir, unsigned int lines) { int count, x, y; unsigned short *s, *d; @@ -595,7 +595,7 @@ static int newport_scroll(struct vc_data *vc, int t, int b, int dir, (vc->vc_color & 0xf0) >> 4); } npregs->cset.topscan = (topscan - 1) & 0x3ff; - return 0; + return false; } count = (b - t - lines) * vc->vc_cols; @@ -670,7 +670,7 @@ static int newport_scroll(struct vc_data *vc, int t, int b, int dir, } } } - return 1; + return true; } static int newport_dummy(struct vc_data *c) |